I'll be dumbfounding you'll be dumbfounding he'll be dumbfounding we'll be dumbfounding you'll be dumbfounding they'll be dumbfounding
Perfect
I'll have dumbfounded you'll have dumbfounded he'll have dumbfounded we'll have dumbfounded you'll have dumbfounded they'll have dumbfounded
V-ing perfect
I'll have been dumbfounding you'll have been dumbfounding he'll have been dumbfounding we'll have been dumbfounding you'll have been dumbfounding they'll have been dumbfounding
Negation
Simple form
I shan't dumbfound you shan't dumbfound he shan't dumbfound we shan't dumbfound you shan't dumbfound they shan't dumbfound
V-ing form
I shan't be dumbfounding you shan't be dumbfounding he shan't be dumbfounding we shan't be dumbfounding you shan't be dumbfounding they shan't be dumbfounding
Perfect
I shan't have dumbfounded you shan't have dumbfounded he shan't have dumbfounded we shan't have dumbfounded you shan't have dumbfounded they shan't have dumbfounded
V-ing perfect
I shan't have been dumbfounding you shan't have been dumbfounding he shan't have been dumbfounding we shan't have been dumbfounding you shan't have been dumbfounding they shan't have been dumbfounding
Interrogative form
Simple form
shall I dumbfound? shall you dumbfound? shall he dumbfound? shall we dumbfound? shall you dumbfound? shall they dumbfound?
V-ing form
shall I be dumbfounding? shall you be dumbfounding? shall he be dumbfounding? shall we be dumbfounding? shall you be dumbfounding? shall they be dumbfounding?
Perfect
shall I have dumbfounded? shall you have dumbfounded? shall he have dumbfounded? shall we have dumbfounded? shall you have dumbfounded? shall they have dumbfounded?
V-ing perfect
shall I have been dumbfounding? shall you have been dumbfounding? shall he have been dumbfounding? shall we have been dumbfounding? shall you have been dumbfounding? shall they have been dumbfounding?
Interro-negative form
Simple form
shan't I dumbfound? shan't you dumbfound? shan't he dumbfound? shan't we dumbfound? shan't you dumbfound? shan't they dumbfound?
V-ing form
shan't I be dumbfounding? shan't you be dumbfounding? shan't he be dumbfounding? shan't we be dumbfounding? shan't you be dumbfounding? shan't they be dumbfounding?
Perfect
shan't I have dumbfounded? shan't you have dumbfounded? shan't he have dumbfounded? shan't we have dumbfounded? shan't you have dumbfounded? shan't they have dumbfounded?
V-ing perfect
shan't I have been dumbfounding? shan't you have been dumbfounding? shan't he have been dumbfounding? shan't we have been dumbfounding? shan't you have been dumbfounding? shan't they have been dumbfounding?